Finding the Fourth Proportional to 1,661.07, 2,292.27 and 915.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.07 : 2,292.27 = 915.09 : x
2. Step 2: Convert to fraction form
   1,661.07/2,292.27 = 915.09/x
3. Step 3: Cross multiply
   1,661.07x = 2,292.27 × 915.09
4. Step 4: Simplify right side
   1,661.07x = 2,097,633.35
5. Step 5: Solve for x
   x = 2,097,633.35/1,661.07
6. Step 6: Final answer
   x = 1,262.82